#3078. 4083. [Wf2014]Wire Crossing
4083. [Wf2014]Wire Crossing
#4083. [Wf2014]Wire Crossing
题目描述
输入格式
输出格式
样例
样例输入
8 3 3 19 3  
0 1 22 1  
0 5 22 5  
1 0 1 6  
5 0 5 6  
9 0 9 6  
13 0 13 6  
17 0 17 6  
21 0 21 6  
样例输出
2
#4083. [Wf2014]Wire Crossing
8 3 3 19 3  
0 1 22 1  
0 5 22 5  
1 0 1 6  
5 0 5 6  
9 0 9 6  
13 0 13 6  
17 0 17 6  
21 0 21 6  
2